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《中小学数学》(初中版)2013年第3期刊登了谢鸿飞老师的《由教参中的“误解”引发的思考》一文.其实,2012年6月第一版《教师教学用书·数学(七年级上册)》(新教参)中,对这一“误解”仍没有纠正.正方体的展开图具有一定的实用价值,又是高中学习立体几何的基础.我们知道,在讨论高中立体几何时,通常需要把相关的问题“转化”到同一个平面上来,这一“转化思想”与课标的教学理念不谋而合.为此,我们根据谢老师的论文,作为复习阶段,设计了一种教学思路,运用“转化思想”进行了一次教学尝试.现将体会撰写出来,与同行们交流、探讨,敬请专家、学者和同行批评指正.
In the third issue of “Mathematics in Primary and Secondary Schools” (Junior High School Edition) 2013, published in the article “Thoughts Inspired by Misunderstandings in Teaching and Learning” by Mr. Xie Hongfei. In fact, the first edition of Teacher’s Teaching Books in June 2012 was published. In mathematics (Grade seven) (Protestant), there is still no correction for this misunderstanding. The development of the cube has practical value and is the basis for learning high-level geometry in high school. We know that we are talking about high school. In the case of three-dimensional geometry, it is usually necessary to “transform” the relevant question to the same plane. This “transformation thought” coincides with the teaching concept of the curriculum standard. For this purpose, we use the paper given by Professor Xie as At the review stage, a teaching idea was designed and a teaching attempt was made using “transformation ideas”. Now I have written my experience, exchanged ideas with my colleagues, and invited experts, scholars, and peers to criticize and correct me.